3. a 2.5 mm thick steel pipe (diameter 25 cm) transports nitrogen gas at a temperature of 500°c. in any 10 cm section of the pipe, nitrogen atoms are "lost" into the external environment at a rate of 7.5 x 108 atoms/s. if the nitrogen concentration at the exterior pipe surface is 1.5 x 1012 atoms/cm3, find the nitrogen concentration at the interior pipe surface. the diffusion constants for nascent nitrogen in steel are do = 0.003 cm2/s, q = 76.1 kj/mol and r = 8.314 j/k·mol.

How do the measurements of charge at the different locations on the sphere compare to each other? the charge measurements are different at all locations on the sphere. the charge measurements are virtually not the same at all locations on the sphere except for the charge at the very top and at the very bottom that are equal. the charge measurements are virtually the same at all locations on the sphere except for the charge at the very top. at the top, the conductive sphere has a small disk that is made of different material. the charge measurements are the same at all locations on the sphere. what happens to the charge on the conductive sphere when it is connected to a source of charge such as the electrostatic voltage source? nothing will happen because no charge goes around the surface of the sphere. the charge on the conductive sphere spreads out over the surface of the sphere; being greater in some specific locations on the sphere. the charge on the conductive sphere spreads out uniformly over the surface of the sphere. the charge on the conductive sphere spreads out non-uniformly over the surface of the sphere.

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.

What quantity do units represent in value